155664653 has 2 divisors, whose sum is σ = 155664654. Its totient is φ = 155664652.

The previous prime is 155664637. The next prime is 155664679. The reversal of 155664653 is 356466551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123254404 + 32410249 = 11102^2 + 5693^2 .

It is a cyclic number.

It is not a de Polignac number, because 155664653 - 2⁴ = 155664637 is a prime.

It is a super-2 number, since 2×155664653² = 48462968387220818, which contains 22 as substring.

It is equal to p_8744837 and since 155664653 and 8744837 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155664653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155667653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77832326 + 77832327.

It is an arithmetic number, because the mean of its divisors is an integer number (77832327).

Almost surely, 2^155664653 is an apocalyptic number.

It is an amenable number.

155664653 is a deficient number, since it is larger than the sum of its proper divisors (1).

155664653 is an equidigital number, since it uses as much as digits as its factorization.

155664653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324000, while the sum is 41.

The square root of 155664653 is about 12476.5641504382. The cubic root of 155664653 is about 537.9352485376.

The spelling of 155664653 in words is "one hundred fifty-five million, six hundred sixty-four thousand, six hundred fifty-three".